C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/04 (2006.01) B01D 3/00 (2006.01) C02F 1/44 (2006.01)
Patent
CA 2654508
A method and apparatus for separating draw solution solutes and product solvent from a draw solution using a plurality of distillation columns. In one embodiment, the draw solution is used in a Forward Osmosis (FO) water desalination process. In this embodiment, the draw solution is directed to the plurality of distillation columns in parallel while the energy stream (heat) is directed to the plurality of distillation columns in series such that the efficiency of heat use is improved and in turn the cost of the heat is reduced.
L'invention concerne un procédé et un appareil de séparation de solutés d'une solution hypertonique et de solvant produit issu d'une solution hypertonique à l'aide d'une pluralité de colonnes de distillation. Dans un mode de réalisation, la solution hypertonique est utilisée dans un processus de dessalement d'eau par osmose directe (FO). Dans ce mode de réalisation, la solution hypertonique est dirigée vers la pluralité de colonnes de distillation en parallèle tandis que le flux d'énergie (la chaleur) est dirigé vers la pluralité de colonnes de distillation en série, de sorte que le rendement d'utilisation de la chaleur est amélioré et que, par suite, le coût de la chaleur est réduit.
Elimelech Menachem
Mcginnis Robert L.
Gowling Lafleur Henderson Llp
Yale University
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